Chris Cramer
Super User
After successfully completing my foundry and refining a few aluminium ingots I'm looking into casting some other projects, starting with aluminium working towards silver or brass. Sand casting seems to be the cheapest method, and there are countless formulas of green sand; but I cant seem to find any place in Calgary that sells calcium bentonite or sodium bentonite, preferably calcium. Play sand water and bentonite are the only materials I need to make green sand, the first two are easily accessible, but what about the bentonite?